The CAP ALUM POLY 270UF 20 2V SMD is a type of capacitor, specifically an aluminum-polymer capacitor. It has a capacitance of 270 microfarads and operates at a voltage of 2 volts. The component is designed for surface mount technology (SMD) and is packaged in a 2917 metric format. Additionally, it has a resistance of 9 milliohms and is rated to withstand temperatures up to 105 degrees Celsius for 1000 hours.